Window lock



Feb. 7, 195@ R. C, CHAPMAN 2,496,698

WINDOW LOCK Filed July 19, 1946 :i 2s 2.a

INVENTOR.

AQMAN ATMMM Patented Feb. 7, 1950 UNITED STATES PATENT GFI-ICE 2,496,698 t' i WINDOW were Roy G. Chapman, Detroit, Mich. .entretien Jury is 1946.?, 'Seial eee-ile 5` claims'. (Cl. 292-210) eterne frame niemeer ai its from surface. by

in operation, Said leek .fie-vice comprising @Illy a few vsimple parts ,and which .can not readily gvet. oi it.oforder.V Y

vFurther .obieets andadventages 0f the invention will become apparent fro'rnthe rollowing description and claims, and from the accom? Panyine drawings, wherein:

Figure 1 is affront elevational View of a portion of a window equipped with a window sash lock device according to the present invention.

Figure 2 is an elevational view of the Upper lock member of the window sash locking device emp10yed-ir1e1i`e11re`1 Figure 3 is a horizontal cross sectional view taken online 3-3 of Figure 2,. l y

Fig-ure 4 .is a top plan View of .the lower lock member employed in the sash lokingdevice of Fig/ure 1, kshowing in dotted lines the latch'when closed in order to engage the lug of the upper sash lock.

Figure 5 is a front elevational view of the lower lock member of Figure 4.

Figure 6 shows a side view in elevation of the upper lock member in lockingI position, and in dotted lines the position of the arm and lug when in inactive position.

Referring to the drawings, II designates the upper sash and I2 designates the lower sash 0f a conventional double-sash window structure. It is frequently desired to lock the lower sash in a partly raised position wherein it provides ventilation but does not permit entry of unauthorized persons. According to the present invention, a locking means is provided comprising an upper lock member I3 secured to the side frame portion of sash II, and a lower look inember I4 secured to the top of lower sash I2 and lockingly fio-operatingwith upper member I3, Upper lock member I3 comprises a plate member I5 carrying at one side thereof a box-like housing I6. Housing I6 has upper and lower securing tabs Il and I8 for securement of the lock member to the inner side surface of the sash side frame member in the position shown.

in Figure 1. Plate member I5 is also secured to aIWQQd Serew .IS or the like. "Rotate/ely' secured ip housing 151s a laterally nreieetine Shaft 316m-, ber 20. formed with a de'pendin-g arm F2i having a forwardly projectie.ey lue 2.2 et .its .lower eni Shaft member 20. is resilierrtlr Secured inside.'

housing I 6 by a coil spring 2 3 which encircles the shaft member ansi/1....ears .between the .meer wall surface of the housing and a removable .Split Weeber .24. secured to the inner end ,portion eine. .Shaft member .Coil 'spring 23 is Ymier compressien between the baleine' I6 and the split-washer 2li vso that .the end of the arm is. pressed inwardly where it engages with .the

window frame il, to form a f rictional detent in arly .positiva either upwardly extended t0. the resitien iridieeted 11.1. ldetted lines .in Figure .6; Where .thearm is tptallr Within thesneee bePWel? the glass of the .upper .freine U and the rail. et the lower trarne ,I..2.;Qr.i.n`.tl1.elewer and locking p9 tlerishown in, .fuil'lines .in that eure, Where it iS, seleetvely engaged. by .its 111e .2;2 with the lower latching' member [2,8 or is positioned above member i8., .Se .that the wiedew may be raised acertain distance only. f Lower lock member I4 comprises a horizontal bracket member 25 having depending vlegs 25, farmed vwith .leterallyeriendne lues .2.1, 2l for securing the bracket member tothe top of the lower sash I2. Pivotally secured to bracket member 25 is a latch arm 28 formed with an upstanding handle 29. As shown in Figure 1, latch arm 28 may be swung to overlie lug 22 of the upper lock member I3 to thereby secure lower sash I2 against either upward or downl ward movement with respect to upper sash II, downward movement being resisted b-y the abutment of latch arm 28 with lug 22 and upward movement being resisted by the abutment of lug 22 with the top of lower sash I2. To release the lock members,Y latch arm 28 is swung outwardly to the full line position thereof shown in Figure 4.

While a specific embodiment of a sash locking device has been disclosed in the foregoing description, it will be understood that various modications within the spirit of the invention may occur to those skilled in the art. Therefore it is intended that no limitations -be placed on the invention other than as defined by the scope of the appended claims.

What is claimed is:

1. Sash locking means for windows of the type having an upper sash and a lower sash slidable with respect to said upper sash, comprising a plate member adapted to be secured to a side frame element of the upper sash, a housingcarried at one side of said plate member, an arm pivotally mounted in said housing for rotation around a horizontal axis, a forwardly projecting lug carried by said arm, a horizontal bracket adapted to be secured to the top of the lower sash adjacent said arm, and a latch member pivotally secured to said: bracket for rotation in a horizontal plane, said latch member being formed and arranged to overlie said lug.

2. Sash locking means for windows of the type wardly over the top of the lower sash, a hori- `zontal bracket member, means securing said having an upper sash and a lower sash slidable with respect to said upper sash, comprising a plate member adapted to be securedv to a side frame element of the upper sash, a housing carried at the inner side of said plate member, a horizontal shaft journalled in said housing, a depending arm carried by said shaft, a forwardly projecting lug on said depending arm, a horizontal bracket, means securing said bracket to the top of the lower sash in vertically spaced position above said top, and a horizontal latch member pivotally secured to said bracket, said latch member being formed and arranged to overlie said lug, said lug being formed to overlie the top of the lower sash, whereby movement of the lower sash with respect to the upper sash is restrained.

3. Sash locking means for windows of the type having an upper sash and a lower sash slidable with respect to said upper sash, comprising a plate member secured to a side frame element of the upper sash, a box-like housing carried at the inner side of said plate member, a horizontal shaft journalled in said housing, means exerting frictional pressure on said shaft to prevent free rotation thereof, a depending arm carried by said shaft, a forwardly projecting lug on the end of said depending arm, said lug being formed to overlie the top of the lower sash, a horizontal bracket member, means securing said bracket member to and in raised position above the top of said lower sash, and a horizontal latch member pivotally secured to said bracket member, said latch member being formed and arranged to overlie said lug.

4. Sash locking means for windows of the type having an upper sash and a lower sash slidable with respect to said upper sash, comprising a plate member secured to a side frame element of the upper sash, a box-like housing carried at the inner side ed-ge of said plate member inwardly of said frame element, a horizontal shaft journalled in the side wall of said housing, spring means in said housing exerting frictional pressure on said shaft to preventv free rotation thereof, a depending arm carried at the outer end of said shaft, a forwardly projecting lug on the end of said depending arm, said lug extending forbracket member to the top of said lower sash in vertically spaced relation thereabove, and a horlzontal latch member pivotally secured to the top f* q. surface of said bracket member, said latch member being formed and arranged to overlie said lug.

5. Sash locking means for windows having an upper sash and a lower sash slidable with respect to said upper sash comprising a housing adapted to beV secured to the upper sash Within the frame area free of conict with the lower sash in raised position, a shaft journaled in said housing, a spring biasing said shaft in said housing to provide a frictional fit between one end of said shaft and said upper sash, an outwardly extending lug on the other end of said shaft, and a pivotally secured latch member on the lower sash adapted to engage said lu-g on said shaft in one of two positions, whereby said upper and lower sashes may be secured with said lug and latch in one position andmay be movable within limits with said lug and latch in the other position.

ROY C. CHAPMAN.

REFERENCES CITED The following references are of record in the le of this patent:

l UNITED STATES PATENTS Number 

